Bobbin arbor



March 4, 1947. w w c I 2,416,785

aoaam ARB oR Filed June 13, 1945 2 Sheets-Sheet 2 I I INVENTOR I MY/mm[has flaw/Yer Mic/5, I I. BY v @wjtsm hm M ATTORNEYS Patented Marni,

UNITED STATES P rsNrorncs '1 William Elias Detwiler Welch, Rome, Ga., wI signer, by mesne assignments, to Celanese Corporation of America, acorporationof Delaware Application June 13, 1915', Serial No. 599,266-

This invention relates to arbors for the support and rotation ofcylindrical bobbins, and has. for its object the provision of animproved arbor particularly adapted to permit ready reception and andwithout the'jattendant difllculties hereinbefore recited. Generallyspeaking, the arbor of the invention has floating or pivoted arms whichare expanded or contracted by means of an operating disc turnedclockwise or counterclockwise. 68 of the member. An arm 6 Claims. (c1.zip-42) 'l'huathe arbor comprises a generally cylindrical body member,conveniently made of wood, and

having a plurality of circumferentially spaced longitudinal peripheralgrooves. A radially ex-' removal of a bobbin and at the same time 5tending arm is positioned in each groove and is adapted to firmly holdthe bobbin in operative pivotally secured at one e'ndto the body member,position. the other or free end of each arm being capable The." rbor ofthe invention may be used for of radial movement about its pivot.Associated the and rotation of a cylindrical bobbin with such free endsof the arms is means for in, various thread-winding, unwinding, twistingw simultaneously impartingalimited predetermined and similar operations,but is especally adapted radial movement to the arms, whereby the armsfor unwinding rayon thread from packages on may be protracted andretracted to increase or bobbins as described in the United Statespatent decrease, respectively, the effective peripheral of Cooper No.2,331,454. In accordance with the diameter of the arbor. Preferably,this means heretofore customary practice, the thread pack- 5 comprises adisc mounted to turn about the longiage is wound on a cylindrical metalbobbin, usutudinal axis of the body member and having a ally perforated,and the bobbin is carried on a plurality of eccentric slots,circumferentially rotatabl mounted arbor. This arbor has heretospacedlik the arms, into which extend pins forezbeen made of wood with a blankmetaldisc' I protruding from the free ends of the arms. Turnon'br'feendand fitted at both ends with bearing ing of the disc simultaneouslyimparts a similar or gudgeon pins. Three equally spaced longitulimitedradial movement to each of the pivoted dinal arms radiate from the bodyof the arbor, arms, whereby the arms are retracted and prov and stripsof felt are secured in grooves in the tracted to decrease and increasethe effective longitudinal edges of these arms. When new, peripheraldiameter of the arbor for respectively this arbor is forced into thebobbin and has 9. (1) insertion into and removal from and (2)oprelatively-snug grip to prevent slippage. Howeratively holding abobbin. These and other ever, as the felt strips wear, slippageincreases novel features of the invention'will be best underand thestrips must be frequenthr replaced. stood from the following descriptiontaken in Moreover, due to fouling of the felt strips or the vconjunction with the accompanying drawings, in use of undersizedbobbins, the arbor frequently lwhich sticks in th bobbin, and is removedby striking Fig. l is a longitudinal cross section of the one end of thearbor. A lead washer is usually arbor of the invention, with a spinbobbin theremounted onthis striking end of the arbor for on,

balance only, and in many instances this washer Figs. 2 and 3 aretransverse sections on'the line is knocked off by the strikingorhammering of 2-2 of Fig. 1, with the longitudinal arms in their thearbor to remove it from the bobbin. While protracted and retractedpositions, respectively. special bumpers are provided for striking theFig. 4. is an end yiew of the operating end of arbors, operators oftenstrike the arbor against the arbor and bobbin shown in Fig. 1, if a; anyprotruding machinery part to remove it from Fig. 5 is a. transversesection on the line 5-! the bobbin, and this frequently causes damage 40of Fig. 1. to the machinery part. With hi type f r or. Fig. 6 is adetail view of the end washer for no adjustment of its effectiveperipheral diameter the body member of the arbor, and is possible exceptby varyihg the width of the Fig. 7 is an elevation of a thread unwindingfelt strip, and this is neither satisfactory norapparatus with which thearbor may be advanpractical. Consequently, the use of these arborstageously used. d entails a constant and high maintenance cost in 1The'arbor of the invention has a base end and. addition to frequentperiodic replacements. an operating end, being the left and right handThe arbor of the invention is characterized by ends, respectively, asviewed in Fig. 1. its ready and convenient insertion into and re- Thebody member I 0 of the arbor is generally moval from a bobbin withoutdamage to the arbor cylindrical and is conveniently made .of wood,

although it may be made of any other suitable material.-Circumferentialiy spaced about its periphery, the body member has threegrooves H extending throughout the longitudinal length I2 is positionedin each The arms |2 are preferably their outer edges have longitudinalslots intoa roove, and each arm is pivoted at the base end if the bodymember. Conveniently, the base end jof the body member may have anenlarged hub for spider I 3 for facilitating the insertion of a pivotpin -|4 through the end of each arm |2 The arms are loosely fitted intheir; respective igrooves, so that their free ends are capable of acertain amount of radial movement about the ipivot pins l4. 7 Agenerally circular disc is operatively mounted at the operating end ofthe body memher It, adjacent the free ends of the armsv l2.

is turnedto position the ends of the slots 2|,and the arms i2 areretracted and the arbor has its minimum effective peripheral diameter..The arbor is then inserted in a bobbin 28, such for example as thecommon perforated metal spin bobbin. The disc l5 isthen' manually turneduntil the pins 22 occupy the rearward ends of the slots 2|. ofthisturning movement protracts. the arms 12 The first half until thearbor has its maximum effective peripheral diameter, and the second halfof the The disc l5 may conveniently be mounted to turn I freely on ahearing or gudgeon pin it positioned in the longitudinal axis of thebody member Ill and appropriately secured thereto, as for. exam-,

"ple by being inserted a suitable distance in the icenter ofthe'operating-end of the member ID .}(Fig. l) As illustrated in thedrawings, the pin :l6'has an enlarged hub i1 on which the disc I! isrotatably mounted and an outside restraining washer. l8, which alsoserves as a bearing washer for the bearing end of the pin IS: A washerl8 is secured by screws or the like to the end of the member l0, and thedisc I! is positioned between the washers l8 and I9 and turns freel onthe hub |1.-

turning movement locks the arms in their pro-Q tracted positions. Theresilientstrips 24 press against the interior of the bobbin and securely18 hold it on the arbor. Where the bobbin carries a a package of thread29 to be unwound, the'arborof the invention, with the bobbin and threadpackage-secured thereon, may be mounted with surface or the package witha uniformly driven its gudgeon pins l6 and 21 in'the slots of theupright supports 3|, and the thread unwound at a uniform speed byengagement of theperipheral.

endless belt 32, as particularly described in the aforementioned PatentNo. 2,331,454. The base" i The disc I5 may advantageously be made ofhard flber,-and ha three eccentric slots 2|, circumferentially spaced toconform with the cir- 'cumferentially spaced arms l2. Itwill beunderstood that the arbor may be, provided with more than three arms,equally spaced about the periphery of the body member l0, and the disc|5 will have a corresponding number of similarly disc 25 and the bearingwasher l8 protect the bobbin 28'from damage'on-its ends by scraping i onthe sides of the supports 3L Heretofore there has been no suchprotection for-the. ends of the bobbin, and theyhave consequently"suffered considerable damage. The arbor of th invention is a unitarystruc- "ture, light'inweighhwith no parts likely as be I fouled by straythread. It is easily handled, and can be inserted in and removed from aspin bob-- spaced eccentric slots'2l. The free ends of the 1 arms l2 areprovided with protruding pins 22 which extend into the correspondingslots 2| of the'di'sc'lfi. The disc l5 has cut-outsor indentations23 anda serrated peripheral edge to permm it to be readily grasped and turnedby the hand of the operator.

made of wood and which are tightly fitted resilient strips or cushions24, such for example as strips of'synthetic rubber, having ampletraction and resiliency. The base end of the member illis covered by adisc 25, preferably of hard fiber, fastened to the 'member I 0 by screws26 or the like. The disc 25 servesas a hand hold as well as stop for the4 bobbin. A hearing or gudgeon pin'2l is inserted The eccentric slots 2|and coofieratingpins 22 may be considered as cams andJ am-followers;respectively. When the pins are' atthe rearward ends of the slots, asindicated in Fig. 4, the arms l2 are in their protracted positions, asindicated in Fig. 2. Turning the disc 15 counter-clockwise, as viewed inFig. 4, moves the pin 22 to the forward ends of theslots 2| and radiallywithdraws bin in less time than is now possible with the heretoforecustomary types of arbors. The arbor adjusts itself to various diametersof spin bobbins 1 .and at the same time exerts a uniform inside tensionon the bobbin, preventing slippage and fur ther placing a moreuniform'tension on the thread being unwound, twisted or the like. Nofriction .a suitable distance in the center of the base 'end oi themember HI.

is exerted on any parts of the bobbin during the insertion and removalofthe arbor, but when the disc is turned the bobbin is firmly secured tothe.

mer type of \arbor. ,This permits the use of syns ability to use thinstrips of syn- I invention.

the arms I 2 to their retracted positions, as indicated in Fig. '3. Mostof the radial movement of the arms is effected as their pins movethrough the forward half of the slots, and the movement of the pinsthrough the rearward half of the slots is in the nature of a lockingaction, as will be seen from an inspection of the configuration of theslots in Fig. 4. In

other words, the forward half of each slot 2| isentirely eccentric,while the rearward half of the slot is practically concentric, withrespect to the longitudinal axis of the arbor.'

QIn the operation of the arbor, the disc I5 While: the invention has"been particularly described and illustrated iii-connection with acylindrical metal bobbin, it is equally applicable to I other types ofbobbins and'similar supports for yarn packages. of Celluloid (or Forexample, arolled up sheet similar resilient material) insorted in thecentral openingol' an otherwise unsupported annular cake of rayon (orthe like) may be distended by inserting and locking the arbor of theinvention within the Celluloid sheet.

The thus distended Celluloid sheet is in effect a ,bobbinoperativelymountedon the arbor of the invention. v V

I claim: v 1. A bobbin arbor comprising a generally cylindrical bodymember having a plurality of cirpins 22 at the forward.

I or the like, rather than thick strips of felt, is a distinct advantageof thearbor of the thetlc rubber, which does not foul as does felt, andmoreover,v is not deleteriously. afiected by oil ff gas feltis. '.theticrubber,

cumferentially' spaced grooves extending throughout the length of themember, a radially extending arm positioned in each of said grooves andpivotally secured at one end to the body member, a pin extending fromthe other and free end-oi each arm, a disc operatively secured to thebody member to turn about the longitudinal axis thereof and providedwith slots cooperatingzwith said pins for. simultaneously imparting alimited radial movement to the free ends of said arms.

' 2 A bobbin arbor comprising a generally cylindrical. body memberhaving a plurality oi circumferentially spaced longitudinally extending'peripheral grooves, a radially extending arm positioned in 'e'ach orsaid grooves, one end of each of said arms being pivoted to the base endof saidmember and the other end of the arm hav me a pin protrudingtherefrom and being capable of radial movement about its pivot, and adisc operatively associated with the other end 01 said 1 one end of eachoisaid arms being pivoted to i said hub and the other end being capableof,

having a plurality of slots circumferentially spaced like said arms andinto which said pins extend, a portion of each of said slots beingeccentric and the remaining portion substantially concentric withrespect to the longitudinal axis of said member. r

, 5. YA bobbin arbor comprising a generally cylindrical body memberhaving a hub atone end and a plurality of circumierentially spacedlongitudinally extending peripheral grooves, a radially extending armpositioned in each or said grooves,

' radial movement about its pivot, a pin extending member and adapted tobe turned about the longitudinal axis 'or the member, said disc having aplurality of eccentric slots circumierentially spaced like said arms andinto which extend said pins protruding from .the adjacent ends-oi saidarms whereby turning of the disc simultaneously protracts or retractssaid arms.

3. A bobbin arbor comprising a generally cylindrical body member havinga plurality of circumiere-ntially spaced" longitudinally extending 1peripheral grooves, a radially extending arm p0- sitioned in each orsaid grooves, one end 01 each of said arms being pivoted to the base endof said member and the other end of the arm being capable orradial'movement about its pivot, a pin protruding from said other end oreach arm, a

gudgeon pin centrally mounted in the.other end or said member, a discrotatably mounted on said gudgeon pinvadiacent that end of the member,

and a washer secured to the gudgeon pin to restrain lateral movement ofsaidv disc, said disc having a plurality of eccentric slots circumferentiaily spaced like said arms and into which said pins extend wherebyturning of the disc simultaneously protracts or retracts said arms.

a disc operatively associated with the other end 55 1,964,585

or said member and adapted to beturned about from said other end ofeach'arm, a pair of spaced washers secured to the end of said bodymember opposite its hub, a disc positioned between said washers andoperatively mounted to turn about the longitudinal axis 01 .the bodymember, said disc having a plurality or eccentric slots circum-ererentially spaced as said arms and into which said pins extend wherebyturning of the disc radial movesimultaneously imparts a similar ment toeach of said arms.

6. A bobbin arbor comprising a generally cylin drical body member havinga-plurality oi circum-c ierentially spaced longitudinally extendingperipheral grooves, a radially extending arm positioned in each. of saidgrooves. one end of each or said arms being. pivoted to the base end orsaid member and the other end or thearm being capable of radial movementabout its pivot, a pin protruding from said other end of each arm, a

"gudgeon pin centrally mounted in the other end 01 said member, a discrotatably mounted'orrsaid gudgeon' pin adjacent that end oi the member,a washer secured to the gudgeon pin to restrain lateral movement of saiddisc, said disc having a plurality oi. eccentric slots circumierentiallyspaced like said arms and into which said pins extend whereby turning oithe disc simultaneously protracts or retracts said arms, a disc coveringthe base end oi said member for limiting lateral movement of a bobbin,and a gudgeon pin ttientrally'mounted in the base end oi said mem--W1LLIAM ELIAS DETWILER WELCH.

anraasncsscrrnn The following references are of record in the me or thispatent:

the longitudinal axis oi the member, said disc UNII'ED era-ms rams-s"Nama ma Number Larsen June 26, 1934 1,870,886 Fellcws-...-....... May22. 1928 3

